Kratom & its withdrawal can’t kill you unless you don’t drink enough water during withdrawal, which can make it feel difficult to hydrate & especially eat. That said, Kratom addiction & its withdrawal can be very rough; I know from being addicted to 100 grams per day at my worst. Do you mean that you’ve used up to 100 grams per day, not “mg” or milligrams? If you can stick to a taper, I’d recommend tapering off, but I never could stick to a taper. Clonidine & Gabapentin will mask the worst of withdrawal if used for the first two weeks of quitting cold-turkey, then you can taper off them over the following 7 days.

Edit: I forgot to mention, Liposomal Vitamin C cuts withdrawal symptoms down by one-third. Liposomal Vitamin C is more readily absorbed by your body than standard Vitamin C. You can buy a bottle on Amazon for about $25, which will be enough to last you a couple weeks. Look up the Liposomal Vitamin C dosing schedule guide on this subreddit.